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A kind of preparation method of lighting material

A technology of slurry and precipitation method, which is applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of high preparation cost, affect the performance of ceramics, change of phosphor powder, etc., and achieve high powder surface activity and high mixing uniformity. , the effect of reducing the sintering temperature

Active Publication Date: 2020-12-01
SUN YAT SEN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phosphor powder encapsulated by the existing ceramic material is limited by the sintering temperature and the sintering method, the performance of the phosphor powder may change during the sintering process, and the cost of preparation is relatively high; in addition, in order to avoid damage to the grain surface of the YAG phosphor powder Morphology, the prior art uses a short ball milling time, which may cause uneven mixing, thus affecting the performance of the final ceramic
[0004] Therefore, in view of the above deficiencies, it is necessary to provide a preparation method of lighting materials to solve the problems of high cost and insufficient performance of the existing preparation methods.

Method used

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  • A kind of preparation method of lighting material
  • A kind of preparation method of lighting material
  • A kind of preparation method of lighting material

Examples

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Effect test

Embodiment 1

[0050] refer to figure 1 , the preparation method of the lighting material provided in this embodiment specifically includes step S1: preparing Al by precipitation method 2 o 3 Mixed powder of nanometer powder and fluorescent powder; step S2: preparing luminescent ceramics by solid phase method.

[0051] Step S1 includes:

[0052] Step S11: preparing a precipitant solution, and adding a dispersant to the precipitant solution to prepare a mixed solution containing a precipitant and a dispersant;

[0053] Step S12: adding phosphor powder to the mixed solution obtained in step S11 to prepare a phosphor powder suspension;

[0054] Step S13: adding soluble aluminum salt to the phosphor suspension obtained in step S12 to obtain 2 o 3 Precursor precipitation and phosphor suspension;

[0055] Step S14: The above suspension is centrifuged, washed, dried, and heat-treated to obtain Al 2 o 3 Mixed powder of nanometer powder and fluorescent powder.

[0056] Wherein, the precipita...

Embodiment 2

[0078] This example is basically the same as the previous example, the difference is that the Al prepared by S1 in this embodiment 2 o 3 The crystal phase of nano powder is θ-Al 2 o 3 and γ-Al 2 o 3 . The following is still the soluble salt as Al(NO 3 ) 3 , the precipitating agent is NH 4 HCO 3 , the phosphor is YAG phosphor, the dispersant is PEG and (NH 4 ) 2 SO 4 As an example to explain.

[0079] The specific preparation method is:

[0080] Configure 0.5-3mol / L Al(NO 3 ) 3 The solution is ready for use;

[0081] Configure 0.5-3mol / L NH 4 HCO 3 solution, and an appropriate amount of PEG and (NH 4 ) 2 SO 4 , to obtain a precipitating agent, PEG and (NH 4 ) 2 SO 4 mixed solution;

[0082] Mix an appropriate amount of YAG fluorescent powder with the above solution, wherein the amount of PEG is 1%-3%wt(Al(NO 3 ) 3 + phosphor). The amount of phosphor powder accounts for the phosphor powder and Al 2 o 3 (by Al(NO 3 ) 3 Amount converted to obtain) 15...

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Abstract

The invention discloses a preparation method of an illumination material. According to the method, Al2O3 nano-powder is prepared by a precipitation method. By the precipitation method for preparationof the Al2O3 nano-powder, the powder with small particle size and different crystal phases can be obtained, the particle size ranges from 20 nm to 100 nm, and the crystal phases can be alpha-Al2O3, theta-Al2O3 and gamma-Al2O3. By reducing the particle size and controlling the crystal phase, ceramic sintering temperature is reduced, and the influence of the excessive sintering temperature on the performance of phosphor is reduced, and the production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a preparation method for luminescent ceramics. Background technique [0002] Using light sources such as lasers or LEDs to excite fluorescent conversion materials to obtain predetermined monochromatic light or polychromatic light is a technical solution that is widely used in the fields of lighting sources, projection displays, and the like. The performance of fluorescent conversion materials directly affects the performance of lighting and projection. In order to improve the performance of the entire light source system, fluorescent conversion materials are required to have the characteristics of high optical conversion efficiency, high brightness, ability to withstand high-power laser irradiation, good thermal conductivity, and long life. [0003] Traditional fluorescent conversion materials are prepared by silica gel or glass-encapsulated phosphor te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/64C04B35/44C09K11/80
CPCC04B35/10C04B35/44C04B35/64C04B2235/3206C04B2235/5454C04B2235/6581C04B2235/9646C09K11/7706
Inventor 徐梦梦李乾陈雨叁许颜正
Owner SUN YAT SEN UNIV
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